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6. Interlock switches
• You can test continuity of safety interlock and monitor switch by using ohmmeter.
• The switch operation is checked by zero/unlimited.
The meter should indicate zero resistance.
• The sequence of check is interlock monitor switch, primary and secondary interlock switches check.
1) In case of interlock monitor switch check.
Condition
1) Door is opened.
2) Common terminal of the monitor
switch disconnected.
2) In case of primary interlock switch check.
Condition
1) Door is closed.
PRIMARY
INTERLOCK SWITCH
INTERLOCK
MONITOR
SWITCH
POWER
SUPPLY
CORD
OHMMETER
PRIMARY
INTERLOCK SWITCH
INTERLOCK
MONITOR
SWITCH
POWER
SUPPLY
CORD
OHMMETER